Why do geologists think earth's core contains mostly iron?
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a. the crust contains no nickel.
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b. the crust contains a mixture of iron and silicon.
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c. the moon's crust contains far less iron than earth's crust.
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d. other orbiting bodies contain more iron than earth's crust does.

The rate that would change would be the  searching efficiency/attack rate. there are only two other rates in this model: the  growth rate of prey, and the  predator or consumer mortality rate.the  searching efficiency/attack rate is what indicates how effectively can a predator capture its prey whether in the searching process or actual capturing/attacking process.